A.CycleWS: add toggleOrView fns, fix doc, prevent head exception
A.CycleWS: add toggleOrView fns, fix doc, prevent head exception

Ignore-this: 35acc32e696e665aca900721d309d1d3

darcs-hash:20090817215549-18562-ebaf740cc0846b99c78b8d62fa616d2864feadfa

jthornber/XMonadContrib,jthornber/XMonadContrib